Hybrid Density Training: THE BEST Fat Loss Workout You’re Not Doing

By Jon-Erik Kawamoto

Very little is considered new or radical
in the fitness industry these days. Most of the training and programming
parameters such as progressive overload, specificity of training and the
principle of reversibility have stood the test of time. Training concepts may
come and go, but we always seem to fall back on what works best or what proves
to be better.

Putting a HIT on Aerobic Exercise

A prime example is long slow distance
training or aerobic exercise. Once believed as the go-to training method for
fat loss, low intensity training has since been bumped from the top spot and
replaced with high intensity training, also known as high-intensity interval
training (HIT) or burst training. Commonly associated with cyclical-type
exercises, like running and cycling [1], HIT incorporates hard and easy periods
of high and low intensity efforts.

Regular performance of HIT-type workouts have been
shown to be effective at reducing body fat, however, “the mechanisms underlying
the fat reduction…are undetermined but may include [HIT]-induced fat oxidation
during and after exercise and suppressed appetite” [1]. HIT has been found to
significantly lower insulin resistance, which increases the body’s capacity for
fat oxidation [1], which basically means, you’re better able at utilizing fat
for fuel during workouts (depending on exercise intensity) and in the recovery
period, post workout.

Not only great for fat loss, but regular
performance of HIT has been shown to enhance both aerobic and anaerobic energy
systems simultaneously. HIT has been touted as a
time-efficient training strategy because it takes less total time to induce
similar metabolic adaptations that are comparable with longer duration
endurance-type training [2,3]. For example, similar improvements in work
capacity can result from workouts consisting of multiple Wingate Tests, which
involves 30-seconds of maximal cycling on a specialized upright bike, performed
for several weeks, compared to higher volume, lower intensity aerobic workouts
[3].

It’s Circuit Training, Not Crossfit

Combing two or more exercises
together like burpees and deadlifts or chin-ups and kettlebell swings is not
“doing” Crossfit; it’s circuit training. Hamilton Nolan said it best in an
article he wrote for Gawker.com, “You can’t trademark working out, you
#&%kers…you don’t own that sh*t” [4]. Besides, according to Mel Siff [5],
circuit training appeared to be formalized way back in 1953 by R. Morgan and G.
Adamson at the University of Leeds in England, meaning that it was around long
before Crossfit.

Anyways, considered
a complete training system, circuit training is used to develop strength and
cardiovascular endurance simultaneously because it involves pairing two or more
resistance training exercises together. Since we like making acronyms in the
fitness industry, circuit training with minimal breaks is referred to as HIRT
(high-intensity interval resistance training) [6] or HIPT, (high-intensity
power training) [7] in the literature. HIRT and HIPT basically share the same
concept where moderately heavy resistance training exercises are paired
together with minimal prescribed rest periods, with the goal of maintaining a
high power output throughout the duration of the workout [6,7].

Similar to HIT, HIRT and HIPT (follow
me here) have all been shown to be effective at improving body composition by increasing
the energy required for post-exercise metabolism [6, 7], otherwise known as
EPOC (excess post-exercise oxygen consumption) (told you about all the
acronyms). However, I’ll take a step back and state that research seems to be
equivocal regarding the effects of resistance training on the duration of EPOC
as there is hardly any consistency in the resistance training protocols between
studies.

Regardless, exercise intensity and
duration seem to be very influential factors at determining EPOC duration and
magnitude [6] and it appears that compound exercises performed in a circuit
style fashion that focus on loads geared toward muscle building (10-repetition
maximum) may optimize post workout metabolism and increase EPOC for several
hours [8], thus leading to more calories burned overall.

Density Training

Back in 2005, Charles Staley came out
with Muscle Logic: Escalating Density Training [9] – a simple yet effective
training system involving high intensity circuit-style training designed to
ramp up the calorie burn and your work capacity, all while preserving or
increasing muscle mass. Later in 2013, John Romaniello and Adam Bornstein
incorporated their version of density training in their New York Times best
seller, Man 2.0, Engineering the Alpha [10].

Essentially, two exercises are
performed back to back for a given amount of time. The time frames can vary,
but Staley originally planned for 15-minute sets. The recommended weight used is
equal to your 10-repetition maximum (RM) but only 5-repetitions are performed in
each set. The plan is to go back and forth, performing 5-reps of each exercise,
until the time period is over. You would keep track of how many times you go
through the circuit and focus on trying to beat that number, without changing
the weights, the next time you do that same workout, hence the title,
escalating density training.

Hybrid Density Training

Taking the density training approach
to the next level, I like to add a 3rd exercise, a 20-second all out sprint. In
essence, it’s HIT + HIPT = super high-intensity interval training or SHIT for
short (see what I did there??). All jokes aside, the sprint can be performed on
a treadmill, spin bike, air dyne bike, prowler, rower or versa climber.

Parameters: Repeat A1 through A3 for
20-minutes – I suggest longer than 15-minutes because there are now 3 exercises
to cycle through. Keep track of how many rounds you complete.

And here’s a sample workout using the
above template:

Circuit A: HDT Circuit

A1. Conventional Deadlift 10 RM – 5
reps

A2. Barbell Bench Press 10 RM – 5
reps

A3. Treadmill Sprint 20-sec

Perform A1 through A3 with minimal
rest periods. Keep your form tight and don’t be a hero. Repeat for 20 total
minutes and record how many rounds you complete. Try to beat the number of rounds
you completed the next time you perform this workout (keeping the weight and
treadmill settings the same).

Circuit B: HDT Circuit

B1. High Bar Back Squat 10 RM – 5
reps

B2. Barbell Press 10 RM – 5 reps

B3. Air Dyne Sprint 20-sec

Perform B1 through B3 with minimal
rest periods. Keep your form tight and don’t be a hero. Repeat for 20 total
minutes and record how many rounds you complete. Try to beat the number of
rounds you completed the next time you perform this workout (keeping the weight
and air dyne settings the same).

Circuit C*: Density Circuit

C1. Biceps Barbell Curl 10 RM – 5
reps

C2. Decline Dumbbell Triceps
Extension 10 RM – 5 reps

*Choose two isolation exercises for
circuit C

Perform C1 and C2 with minimal rest
periods. Keep your form tight and don’t be a hero. Repeat for 5 total minutes
and record how many rounds you complete. Try to beat the number of rounds you
completed the next time you perform this workout (keeping the weight the same).

Wrap Up

Combing moderately heavy resistance
training exercises and high intensity sprints, as in my Hybrid Density Training
workouts, can be an effective plan of attack to burn a ton of calories and shed
excess fat . Remember to eat a slight calorie deficit and make sure you recover
well between workouts. Also, watch your form near the end of the 20-minute sets
– it’s not worth getting injured so if your form breaks at rep 3 or 4, move on
to the next exercise. For maximum results, perform this type of workout 3 times a week! Good luck.

[10]
Romaniello, J. & Bornstein, A. (2013). Man 2.0 engineering the alpha: A
real world guide to an unreal life: Build more muscle. Burn more fat. Have more
sex. HarperOne.

ABOUT THE AUTHOR

Jon-Erik Kawamoto, CSCS, CEP, is a Personal Trainer, Fitness Writer and owner of JKConditioning in St. John's, Newfoundland, Canada. He has contributed regularly to many major health and fitness magazines and websites such as Men’s Health, Men’s Fitness, Muscle & Fitness and Bodybuilding.com. In addition to training clients and writing, Jon is putting the final touches on his master’s degree in exercise physiology at Memorial University.